The MICRF219A is a 300MHz to 450MHz super-heterodyne, image-reject, RF receiver with automatic gain control, ASK/OOK demodulator, analog RSSI output, and integrated squelch features.  It only requires a crystal and a minimum number of external components to implement.  The MICRF219A is ideal for low-cost, low-power, RKE, TPMS, and remote actuation applications.

The MICRF219A achieves -110dBm sensitivity at a bit rate of 1kbps with 0.1% BER.  Four demodulator filter bandwidths are selectable in binary steps from 1625Hz to 13kHz at 433.92MHz, allowing the device to support bit rates up to 20kbps.

The device operates from a supply voltage of 3.0V to 3.6V, and typically consumes 4.3mA of supply current at 315MHz and 6.0mA at 433.92MHz.  A shutdown mode reduces supply current to 0.1µA typical.  The squelch feature decreases the activity on the data output pin until valid bits are detected while maintaining overall receiver sensitivity.

  -110dBm sensitivity at 1kbps with 0.1% BER

  Auto-polling mode with bit checking

  Supports bit rates up to 20kbps at 433.92MHz

  25dB image-reject mixer

  No IF filter required

  60dB analog RSSI output range

  3.0V to 3.6V supply voltage range

  4.3mA supply current at 315MHz

  6.0mA supply current at 434MHz

  13µA supply current in sleep mode

  0.1µA supply current in shutdown mode

  16-pin QSOP package (4.9mm x 6.0mm)

  -40°C to +105°C temperature range

  3kV HBM ESD Rating